Kamlet-taft solvatochromic parameters of the sub- and supercritical fluorinated ethane solvents.
The Kamlet-Taft parameters describing the dipolarity-polarizability, pie*, and hydrogen bond acceptor ability, B, for ethane and six fluorinated ethane solvents in the sub- and supercritical region of the phase diagram were measured using solvatochromic probe molecules. The measured ultraviolet electronic transitions of the solvatochromic probes in a given solvent were fitted to third-order polynomials in solvent density for all isotherms investigated. The values of pie* and B were calculated for each of the solvents as a function of the solvent density. Trends in pie* values were related to the degree of fluorination about the ethane molecule, while the average B values for all solvents were negative and were interpreted as an inability on the solvents part to act as hydrogen bond acceptors.
|Main Author:||Lagalante, Anthony.|
|Other Authors:||Hall, Robert., Bruno, Thomas.|